Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 84: Gammaastronomie 4
T 84.5: Vortrag
Mittwoch, 6. März 2013, 17:45–18:00, HSZ-E05
Resolved very high energy gamma-ray emission of HESS J1857+026 obtained with the MAGIC telescopes — •Julian Krause1, Victor Stamatescu2, Stefan Klepser3, Rebecca Gozzini3, and David Paneque1 — 1Max Planck Institute for Physics, Munich — 2IFAE, Barcelona — 3DESY, Zeuthen
HESS J1857+026 is an extended TeV gamma-ray source that was discovered by H.E.S.S. close to the Galactic plane. Given its spatial coincidence with the young energetic pulsar PSR J1856+0245, the source might represent a pulsar wind nebula (PWN). Using data from Fermi/LAT, 7 photons above 100 GeV were associated with the source as VHE J1857+0252 by Neronov and Semikoz (2010), while no association was previously reported in MeV-GeV catalogs. HESS J1857+026 was observed with MAGIC in 2010, yielding about 30 hours of good quality stereoscopic data that resulted in a highly significant detection of the source. We present an energy spectrum together with a detailed analysis of the source morphology. We discuss the possible PWN nature of the source based on the spectral and morphological information obtained with MAGIC together with archival multi-wavelength data.